This noble mash-up in eastern Luxembourg is part Medieval, part Renaissance, all castle.

A little sculpture with a large wardrobe.

The prototype for all Nazi concentration camps.

One part local history, 99 parts gruesome haunted house.

Iceland's tribute to its thankless civil servants.

An encyclopedic collection of mammal penises.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Iceland's largest geothermal mud pool is a little bit haunted and a little bit dangerous.

Medicinal spa created with the discharge from a geothermal energy plant.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

The oldest (maybe) swimming pool in Iceland is a stunning oasis built into the side of a lush hill.

Three columns of volcanic rock shoot out of the ocean.

An ode to one of the first concerts broadcast via satellite.

An authentic replica of an Asian temple and garden hidden amongst the natural beauty of Hawai'i.

A unique set of caves that spits waves back out into the ocean.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

More than 2,000 species of tropical plants call this nature preserve and sanctuary home.

Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.

This legendary urban waterfall creates a dazzling display of rainbows.

Watch the newest land on the planet form before your eyes.

Quite simply the largest tree in the world (by volume).

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

The wild west is still alive and well at this authentic mining town watering hole.